Schneider HMISTO512 3.4-inch Monochrome HMI

Overview

The Schneider Electric HMISTO512 is a compact 3.4-inch monochrome HMI. It belongs to the Harmony STO & STU series for basic industrial operator tasks. The panel features a 200 × 80 pixel STN LCD with white, pink, or red backlight. It supports simple control and monitoring in space-constrained environments. The HMISTO512 includes a resistive touchscreen, USB ports, and serial RJ45 connectivity. It communicates via Modbus and Uni-TE protocols for reliable integration. Although discontinued in December 2019, it remains supported for service until December 2023. Recommended replacement models include HMISTO715 for modern applications.

Technical Specifications

• Display Type: Monochrome STN LCD

• Display Size: 3.4 inches

• Resolution: 200 × 80 pixels

• Backlight Colors: White, Pink, Red

• Backlight Life: Red 10,000 hours; Pink/White 50,000 hours

• Touchscreen: Analog resistive

• Brightness Levels: 8

• Touch Sensitivity Levels: 16

• Processor: RISC CPU @ 333 MHz

• Application Memory: 16 MB

• Backup Memory: 128 kB

• Power Supply: 24 V DC ±20%

• Peak Current: 30 A

• Power Consumption: 5 W

• Communication Ports:

• COM1: RS232C/RS485 via RJ45

• USB: 1 × USB 2.0 Type-A, 1 × USB 2.0 Mini-B

• Mounting: Panel mount with 2 spring clips

• Status Indicator: 1 green LED for normal operation

• Supported Protocols: Modbus, Uni-TE

• Real-Time Clock: Accessible via PLC

• Protection Rating: Rear IP20, Front IP65 (indoor use)

• Operating Temperature: 0–50 °C

• Storage Temperature: -20–60 °C

• Humidity: 0–90% non-condensing

• Shock Resistance: 15 gn, 11 ms

• Vibration Resistance: ±3.5 mm (5–9 Hz), 1 gn (9–150 Hz)

• EMC Immunity: 10 V/m